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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <ul>   
    <li>列表条目1</li>
    <li>列表条目2</li>
    <li>列表条目3</li>
    <!-- ul标签里面只能包含li标签 -->


    </ul>
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